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Philip Langdale 4186a77f26 avcodec/nvdec: Round up odd width/height values 
nvdec will not produce odd width/height output, and while this is
basically never an issue with most codecs, due to internal alignment
requirements, you can get odd sized jpegs.

If an odd-sized jpeg is encountered, nvdec will actually round down
internally and produce output that is slightly smaller. This isn't
the end of the world, as long as you know the output size doesn't
match the original image resolution.

However, with an hwaccel, we don't know. The decoder controls
the reported output size and the hwaccel cannot change it. I was
able to trigger an error in mpv where it tries to copy the output
surface as part of rendering and triggers a cuda error because
cuda knows the output frame is smaller than expected.

To fix this, we can round up the configured width/height passed
to nvdec so that the frames are always at least as large as the
decoder's reported size, and data can be copied out safely.

In this particular jpeg case, you end up with a blank (green) line
at the bottom due to nvdec refusing to decode the last line, but
the behaviour matches cuviddec, so it's as good as you're going to
get.
2017-11-24 12:19:31 -08:00
compat compat/cuda: Pass a logging context to load functions 2017-11-20 15:47:05 +00:00
doc avfilter: add mix filter 2017-11-24 16:51:33 +01:00
ffbuild Merge commit '17b6c7efb471e8ff1b8a7271f6531ba1d52bf69c' 2017-11-12 01:02:02 -03:00
fftools lavu,lavfi,ffmpeg: Remove experimental OpenCL API 2017-11-22 23:20:39 +00:00
libavcodec avcodec/nvdec: Round up odd width/height values 2017-11-24 12:19:31 -08:00
libavdevice avdevice/decklink_dec: autodetect the video input format 2017-11-22 00:08:35 +01:00
libavfilter avfilter/af_amix: make use of av_asprintf() 2017-11-24 17:09:48 +01:00
libavformat avformat/ttaenc: add tta_init() 2017-11-24 15:05:35 -03:00
libavresample Merge commit '07a2b155949eb267cdfc7805f42c7b3375f9c7c5' 2017-10-21 14:57:53 -03:00
libavutil lavu,lavfi,ffmpeg: Remove experimental OpenCL API 2017-11-22 23:20:39 +00:00
libpostproc postproc: Drop deprecated qp typedef 2017-10-22 00:35:23 -03:00
libswresample lswr/rematrix: Support s32p. 2017-11-01 01:04:43 +01:00
libswscale Fix missing used attribute for inline assembly variables 2017-11-13 03:58:34 +01:00
presets
tests checkasm/utvideodsp: zero initialize the entire buffer 2017-11-21 11:24:38 -03:00
tools tools/cl2c: Add a copyright header 2017-11-22 23:55:23 +00:00
.gitattributes
.gitignore build: add support for building .cu files via nvcc 2017-05-15 11:46:50 +02:00
.travis.yml Merge commit '4809781586d1c956005f72946a2aab5915eab350' 2017-10-28 15:08:31 -03:00
Changelog avfilter: add mix filter 2017-11-24 16:51:33 +01:00
configure lavu,lavfi,ffmpeg: Remove experimental OpenCL API 2017-11-22 23:20:39 +00:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as videotoolbox* maintainer 2017-11-13 19:54:20 +01:00
Makefile Makefile: fix distclean target 2017-11-14 10:09:40 -03:00
README.md
RELEASE RELEASE: update for git after 3.4 branchpoint 2017-10-11 02:46:23 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • ffserver is a multimedia streaming server for live broadcasts.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.